81. A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are
a) 1346.3 kN and 1500 kN
b) 1436.2 kN and 1250 kN
c) 1346.3 kN and 1250 kN
d) 1436.2 kN and 1500 kN
Ans: c
82. Minimum pull in a suspended cable with supports at two ends is equal to
a) horizontal thrust
b) support reactions
c) resultant of horizontal thrust and support reaction
d) half the weight of the cable
Ans: a
83. A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a
a) parabola
b) catenary
c) cycloid
d) ellipse
Ans: a
84. The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at
a) supports
b) quarter span
c) mid span
d) none of the above
Ans: a
85. A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is
a) 1/3
b) 2/3
c) 1/9
d) 8/9
Ans: d
86. A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is
a) 0.5 m
b) 0.75 m
c) 1.0 m
d) 1.5 m
Ans: b
87. A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is
a) 1/4
b) 2/3
c) 3/4
d) 4/3
Ans: c
88. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centres. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is
a) 2/3
b) 1/5
c) 3/5
d) 1/3
Ans: b
89. When a body slides down an inclined surface, the acceleration of the body is given by
a) g
b) gsinG
c) g cos 6
d) g tan 6
where 'g' is acceleration due to gravity and 9 is the angle of inclination of surface with the horizontal.
Ans: b
90. A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will
a) never meet
b) meet after 1 sec
c) meet after 5 sec
d) meet after 10 sec
Ans: d
a) 1346.3 kN and 1500 kN
b) 1436.2 kN and 1250 kN
c) 1346.3 kN and 1250 kN
d) 1436.2 kN and 1500 kN
Ans: c
82. Minimum pull in a suspended cable with supports at two ends is equal to
a) horizontal thrust
b) support reactions
c) resultant of horizontal thrust and support reaction
d) half the weight of the cable
Ans: a
83. A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a
a) parabola
b) catenary
c) cycloid
d) ellipse
Ans: a
84. The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at
a) supports
b) quarter span
c) mid span
d) none of the above
Ans: a
85. A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is
a) 1/3
b) 2/3
c) 1/9
d) 8/9
Ans: d
86. A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is
a) 0.5 m
b) 0.75 m
c) 1.0 m
d) 1.5 m
Ans: b
87. A ball is dropped from a height of 16 m on a horizontal floor. If it rebounds to a height of 9 m after striking the floor, the coefficient of restitution between ball and floor is
a) 1/4
b) 2/3
c) 3/4
d) 4/3
Ans: c
88. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centres. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is
a) 2/3
b) 1/5
c) 3/5
d) 1/3
Ans: b
89. When a body slides down an inclined surface, the acceleration of the body is given by
a) g
b) gsinG
c) g cos 6
d) g tan 6
where 'g' is acceleration due to gravity and 9 is the angle of inclination of surface with the horizontal.
Ans: b
90. A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will
a) never meet
b) meet after 1 sec
c) meet after 5 sec
d) meet after 10 sec
Ans: d
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